Gravity Variation in Different Time Scales before and after the Wen’an M_S5.1 Earthquake

详细信息   

• 责任者：Liang Weifeng (Second Crust Monitoring and Application Center ; CEA ; Xi’an 710054 ; China) ; Zhu Yiqing
• 刊名：Journal of Seismological Research
• 出版年：2012
• 卷期：35(3)
• 关键词：重力场 ; gravity field ; 强震 ; strong earthquakes ; 河北 ; Hebei Province
• 页码：p.318-322
• 图表：2 illus., 11 refs.
• 分类号：0500
• issnNo：ISSN1000-0666
• isbnNo：CN53-1062/P

摘要

Analyzing the mobile gravity observational data in North China from 2005 and 2009 systematically and deeply, the authors derived dynamic variation of the regional gravity field in different time scales before and after Wen’an M_S5.1 earthquake, and studied the relationship between gravity anomaly variation and seismic activity. The result showed that there existed regional gravity anomaly in a wide range in the survey area during the preparation of Wen’an M_S5.1 earthquake, and there were local gravity anomaly area and high gradient zone of gravity variation referential to the earthquake preparation. The dynamic image of gravity field clearly reflected the evolution orderly and seismic activity of regional gravity field.